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Why can a thin red line become more noticeable among thick black lines?

Answer and explanation

Correct answer: Through contrast of both colour and thickness

The governing concept is combined contrast. The red line differs chromatically from the black lines, and its thin line weight differs from their thick weight. These two differences make it visually distinct even though it is narrow. Similar direction or repetition may organize the group, but neither alone explains why the red line attracts attention; invisibility would produce the opposite result.

Related tags

Line ContrastColour ContrastLine WeightContrastPrinciples Of ArtArt EducationClass 9 Mcq

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